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Simultaneously illuminating traffic light signals at different ranges

  • US 9,620,010 B2
  • Filed: 08/21/2013
  • Issued: 04/11/2017
  • Est. Priority Date: 08/21/2012
  • Status: Active Grant
First Claim
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1. A method of controlling a traffic light for vehicles at a junction, the traffic light having at least two distinguishable light signals, said method comprising:

  • obtaining a lighting pattern of the traffic light that determines an order of turning “

    on” and

    turning “

    off”

    said light signals of the traffic light from a proceed signal to a stop signal at fixed or variable intervals over time;

    illuminating the light signals by at least one illuminator associated with the traffic light, based on the lighting pattern, such that over at least one period of time, a first light of the at least two distinguishable light signals is visible from a first distance range from the traffic light and a second light of the at least two distinguishable light signals is visible from a second distance range from the traffic light; and

    repeatedly updating the lighting pattern based on parameters changing over time relating to the traffic near the traffic light,wherein the first and the second distance ranges are non-overlapping, andwherein the first and the second distance ranges are determined and are repeatedly updated according to estimated stopping distances of the vehicles with respect to the junction for given road characteristics and/or traffic regulations.

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